If I export a file in Piskel, then import the same file again, all of the colors appear to darken or change saturation slightly (can't tell which).

Steps to reproduce the bug:

1. Go to piskelapp.com
2. Create any sprite with any distinct color
3. Export it
4. Import the same file

Environment details:
Operating system: Windows 10
Browser: Firefox

Sprite details:
1 frame, any resolution, session duration doesn't seem to affect anything.